Number of Dyck paths of semilength n such that no level has more than three peaks.

A287967

Number of Dyck paths of semilength n such that no level has more than three peaks.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =5a(4) =13a(5) =40a(6) =119a(7) =376a(8) =1202a(9) =3916a(10) =12920a(11) =42974a(12) =143989a(13) =485623a(14) =1646056a(15) =5601850a(16) =19127858a(17) =65491001a(18) =224750426a(19) =772816118a(20) =2661800949a(21) =9180835248a(22) =31703037147a(23) =109586025511a(24) =379124973003

External references